The best books of the week

Ray Dalio’s insights into national debt crises; why it’s wrong to lionise the likes of Elon Musk; a dark new novel of crime and predation from Joyce Carol Oates; Alexander Starritt’s moving tale of male friendship; a pastiche of Victorian suspense by Nell Stevens; the intertwining of mathematics and creativity; Suzi Feay’s pick of debut novels — plus Nilanjana Roy on the possibilities of sci-fi and an interview with artist David Gentleman